pl23_expn4556.jpg
![What are the brown patches on this rock surface? expn4556.jpg What are the brown patches on this rock surface?](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_expn4556.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23expn4556jpgDescription
What are the brown patches on this rock surface?
Credit
NOAA Office of Ocean Exploration and Research, 2015 Hohonu Moana
Display Date
20150812T202422Z
Location
Hawaii, Bank 9 North
Collection
Voyage to Inner Space
Ocean Exploration Collection
Modern Expeditions
2015 Hohonu Moana